Turn off local mermaid because of Molecule tests

During Molecule tests you're not allowed to write Mermaid config to the control node. So we're turning it off by default.

Author: widhalmt

docs/role-logstash.md

@@ -91,7 +91,7 @@ Aside from `logstash.yml` we can manage Logstashs pipelines.
 
 * *logstash_mermaid*: Print overview over Logstash pipelines in Mermaid syntax. (default: `true`)
 * *logstash_mermaid_logstash*: Place Mermaid syntax into `/etc/logstash/pipelines.mermaid` on Logstash hosts. (default: `true`)
-* *logstash_mermaid_local*: Place Mermaid syntax into temporary file on control node. (default: `true`)
+* *logstash_mermaid_local*: Place Mermaid syntax into temporary file on control node. (default: `false`)
 * *logstash_mermaid_extra*: You can add extra Mermaid syntax to the output by adding it to this variable. YAML-multiline is supported. (default: none)
 
 The following variables configure Log4j for Logstash. All default to `true` as this is the default after the installation.

molecule/elasticstack_default/converge.yml

@@ -19,7 +19,6 @@
     elasticstack_no_log: false
     logstash_pipeline_unsafe_shutdown: true
     logstash_redis_password: "{{ lookup('ansible.builtin.password', '/tmp/redispassword', chars=['ascii_letters'], length=15) }}"
-    logstash_mermaid_local: false # no permission to write into Docker control node
     redis_requirepass: "{{ logstash_redis_password }}"
     beats_filebeat_journald: true
     beats_filebeat_modules:

roles/logstash/defaults/main.yml

@@ -89,7 +89,7 @@ logstash_pipeline_identifier_field_name: "[netways][pipeline]"
 logstash_pipeline_identifier_defaults: false
 
 logstash_mermaid: true
-logstash_mermaid_local: true
+logstash_mermaid_local: false
 logstash_mermaid_logstash: true
 
 # Only for internal use